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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nafion-mesoporous silica composite electrolyte: properties and direct ethanol fuel cells performance

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Author(s):
Ahmed, Z. [1] ; Matos, B. R. [2] ; de Florio, D. Z. [3] ; Rey, J. F. Q. [3] ; Santiago, E. I. [2] ; Fonseca, F. C. [2]
Total Authors: 6
Affiliation:
[1] Natl Ctr Res & Mat Sci CNRSM, Cedria Sci & Technol Pk, Hammam Chatt 1164 - Tunisia
[2] Inst Pesquisas Energet & Nucl, BR-05508000 Sao Paulo, SP - Brazil
[3] Univ Fed ABC, BR-09090400 Santo Andre, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS FOR RENEWABLE AND SUSTAINABLE ENERGY; v. 5, n. 2 MAY 2016.
Web of Science Citations: 2
Abstract

Nafion-mesoporous silica composites were investigated aiming at improved performance of direct ethanol fuel cells (DEFC) operating at high temperature. Mesoporous silica (MPS) was synthesized by a sol-gel technique and added as the inorganic filler into Nafion membranes by casting process. The performance of DEFC using both Nafion and Nafion-MPS composites were evaluated by polarization curves and correlated to the electrical and structural properties of the electrolytes in ethanol environment inferred by impedance spectroscopy and small angle X-ray scattering, respectively. The main results show that Nafion-MPS composite electrolytes exhibit improved performance that was related to a structural pining of the ionic clusters of ethanol-saturated Nafion by the inorganic particles, which resulted in higher proton conductivity of the composite. The experimental results evidenced the relevance of a better understanding of the properties of Nafion-based electrolytes to further develop the direct alcohol fuel cells technology. (AU)

FAPESP's process: 13/50151-5 - Development of composite electrolytes containing inorganic particles of high proton conductivity for direct ethanol fuel cells
Grantee:Bruno Ribeiro de Matos
Support type: Scholarships in Brazil - Post-Doctorate